Carving machine



(No Model.) -6 sheets sheet 1.

F SNOW. GARVING MACHINE.

(Patented Apr.14, 1896.

yj'igw eaac ANDREW B.GRAHAM. PNOTO-LTI'NO.WASHIN6TON.P C

(No Model.) 6 'Sheets -.-Sheet 2.

F. SNOW. I GARVING MAGHINE.

q. 558,223. Patented Apr. 14,1896.

v 2 720672217 ull/Ms um ANBIEW BfiRAHAM. PHOTO-UTMQWASNINGTUKPC.

3 u e e h S m e e h S 6 H N I H Wm M G S I PV R A G q d 0 M O m Patented Apf. 14,1896.

ANDREW BARMIAIlHUTO-LITHlWASHINGIDN. Il :v

6 Sheets-Sheet 4.

(No Model.)

V P SNOW GABVING MACHINE? No. 558,223.

Patented Apr. 14

ANDREW RONAKAM,PNDTOUTHQWASHINGTDND C 6 Sheets- Sheet 5. F. SNOW. GARVING MACHINE.

Patented Apr. 14, .1896.

(no Model.)

2 5206%? o edfi/uik fi wwq (No Model.) 6 Sheets-Sheet 6 F. SNOW. GARVING MACHINE.

Nofssszzs. Patented Apr. 14, 1896.

WW W" ATTORNEY.

ATENT FFIcE.

FREDERICK SNOV, OF LYNN, MASSACHUSETTS.

CARVING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 558,223, dated April 14, 1896.

' Application filed September 5, 1895. Serial No. 561,694. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK Snow, a citizen of the United States, and a resident of Lynn, county of Essex, and State of Massachusetts, have invented a new and useful Improvement in Carving-Machines, of which the following is such a full, clear, and exact description as will enable others skilled in the art to make and use the same when taken in connection with the accompanying drawings, in which Figure 1 is a side View of the machine with part of the frame cut away so as to show the cutting-tools. Fig. 2 is a top view of the machine. Fig. 3 is an end View of a portion of the machine. Fig. 4 is a top View of the tracer and cutting-tools an d their connectingrods. Fig. 5 is a detail view of one of the cutting-tools and its connecting-links with the rod; and Fig. 6 is a side view of the same, showing the gearing and connecting-links. Fig. 7 is a side view of the detail of the mechanism for changing the position of the frame 4 L, and Fig. 8 is a top View of the same.

gradually moved at right angles to the line of reciprocating motion on which the pattern and material to be carved are carried beneath two series of tracer and cutting-tools, the series being placed at an angle to one another and each series attached to a frame, so that one will be removable from contact with the pattern and material to be operated upon when the other is in contact therewith, and the various modifications and combinations hereinafter specified and claimed.

In Fig. 1, A represents the frame or table on which the reciprocating table B moves back and forth. The reciprocating table B is driven forward and back by the rack-bar 6. attached on the under side thereof, in which the teeth of the wheel 0 mesh. The wheel 0 is on the shaft D, which receives motion through a pulley on that shaft from right and left hand belts, which are shifted by means of the dog8, coming in contact with the stops 9 and 10, so that the shaft is reversed each time the reciprocating table reaches the limit of its motion. The motion of the reciprocating table B in one direction brings the dog 8 in contact with the stop 9, which, through the arm 11 and connecting-link 12, reciprocates the gear-rack 13, which turns the gear 14, on which the pawl 15 is hung, so as to come in contact with the ratchet 16 and turn the feed screw 17, to the end of which the ratchet is attached, when the gear-rack moves in one direction, but does not turn it when it moves in the other direction, thus moving the platform or frame 18 sidewise on the frame A, which carries with it the platform B beneath the tracer and cutting-tools.

It is manifest the sidewise motion of the platform 18 is intermittent, and occurs only when the dog 8 comes in contact with the stop at one end of the reciprocating motion of the platform B, so that the platform B passes forward and backward on the same line before it receives any sidewise motion from the under platform or frame 18.

The upright frame F is placed at each side of the machine in which the shaft G is supported, the shaft G running in proper journals, as shown in Fig. 3 at J, and capable of adjustment therein by the adj ustingscrews H. The shaft G is driven by a suitable pulley K, to which power is applied by a belt from any suitable source.

Swinging on the shaft G is the rocking frame L, or, if desired, the frame L may be supported on thimbles on the journals about the shaft G, so that the center of motion of the rocking frame and the center of the shaft will be coincident. This frame L has attached to it at the lower edge or bottom an extension M, to which is attached by a suitable joint a rod on, connected at the other end to the crank n and the segment 0, which segment 0 is geared with a segment 2) of greater diameter, so that about a quarter-revolution of the segment 1) will make a half-revolution of the segment 0.

Attached to the segment 19 by a suitable joint is the rod q, free to move lengthwise in suitable guides, and having at or near each end a catch or stop 8 s, with which the bar 0 on the lower side of the platform B makes contact as it reciprocates when it is at or about the extreme limit of its motion, thereby shifting the rod q, and consequently turning the segment 1) and the segment 0,so that the crank 17. will be revolved a half-turn around the center of the segment 0 and thus shift the rod m and the frame L.

It will be observed that the two positions of rest of the crank 71 are each in line with the center of the segment and the line of motion of the rod q, so that the rod q is locked in its position by the crank 91 being on the center until the rod q is shifted by the contact of the bar 7' on one of the stops 8 or 8'.

Any other suitable mechanism may be used to shift the position of the frame L, and I do not wish to be understood as limiting my invention to this mechanism.

Swung or hinged to the rocking frame L are the tool-carrier frames 0 P, each being the counterpart of the other, one on either side of the rocking frame LL These frames are pivoted on thimbles attiched to the rocking frameL, surrounding the shaft G, so that their center of adjustment will be about the center of the shaft G. Each tool-carrier frame 0 P is also attached to the rocking frame L by the adj Listing-rods Q R, passing through holes in the upper part of the rocking frame L, provided for that purpose, and provided with adjusting-nuts, so that the tool-carrier frames 0 I may be adjusted at proper angle with one another and with the hanging-frame L, as is found desirable. The tool-carrier frame 0 is provided with a dovetailed groove, as seen more plainly in Fig. 3, wherein the brackets for the tracer and tool-carriers are adjusted at such distances from one another as may be found necessary. The tool-carrier bracket S is shown in Fig. 1 in position in the dove-- tailed groove of the tool-carrierframe 0, while the tool-carrier bracket T is shown in position in the tool-carrier frame P.

The tool-carrier brackets consist of the dovetailed part fitting in the dovetailed groove of the tool-carrier frame, and they have journaled in them the shaft U, (shown more distinctly in Fig. 6,) at or near one end of which the beveled gear 1 is attached, and to the other end of which the beveled gear 2 is attached. Attached to the tool-carrier bracket S, on a thimble surrounding the shaft U, is the bracket 3, having a journal in each leg through which the tool-carrier spindle 4: passes, to which is attached the bevelgear 5. The tool-carrier spindle i is made to receive a cuttinghead G, the cutting-head 6 being attachable and removable from the shaft 4-, so as to supply a sharp cutting-tool.

The bracket 3 may be set in any position in relation to the tool-carrier bracket S by turning it around the thimble, and is so secured by the set-screw 19, passing through the bracket 3 and looking on the thimble of S. Revolution is given to the cutting-tool from the shaft G by means of the bevel-gear 7 thereon, one of which is supplied for each cutting-tool, the shaft G being provided with a groove to receive the lock-key of each gear. The gear 7 meshes with the gear 1 and turns the shaft U, thus causing the gear 2 to drive the gear 5 and the tool-carrier spindle 4, each gear increasing the speed of motion, so as to give a rapid revolution to the cutting-tools.

The bevel-gear I have described as gears but I generally prefer to use bevel-wheels having rawhide contact-faces, as at the very high speed at which the tool-carriers are run better results are obtained by so doing.

The beveLgear 5 on the tool-carrier spindle 4 is held in journal-bearings in the bracket 3, but free to revolve therein as driven by the gear 2, and is provided at its center with an axial bore, through which the tool-carrier spindle 4c passes, a feather and spline being provided, so that the tool-carrier spindle l will be revolved by the revolution of the gear 5,while at the same time the tool-carrier spindle is free to move longitudinally, as may be desired.

To the upper end of the tool-carrier spindle 4 is attached the guide-box 20, between the collars 21 and 22 on the tool-carrier spindle, so that the spindle may turn in the guide-box 20, but cannot move longitudinally therein.

Rigidly attached to the guide-box 20 is the segment 23, which runs in the box 24, which box is provided with the friction-wheels 25 and 2G. The box ET is connected by the link 27 to the crank or arm 28, which is attached and moves with the shaft 29, which is provided with a spring 30, the recoil of which presses the crank 28 down, and thus tends to project forward the point of the cuttingtool. The pointer or tracer 352, which follows on the pattern, is attached to the shaft 29 in the same way as is the cutti11g;tool, as shown in Fig. 4.

Connecting the several brackets 3 and the tracer or pointer is the rod 31, secured to each bracket 3 and to the pointer by a pivotal bolt, as shown more clearly in Fig. (5.

One cutting-tool may be used with the pointer, or two or more, as desired, each being driven and connected with the pointer, as shown in Figs. 4, 5, and 6.

Having described the mechanical construction of the device, I will now proceed to describe its mode of operation.

The pattern to be reproduced is secured on the table 13 so that it will pass under the pointer or tracer 32 as the table reciprocatcs and is gradually moved crosswise. The ma terial to be operated upon or carved is placed so that it will come under the cutting-tool (i, the bracket 3 having been adjusted at such an angle, by means of the set-screw 19, as is best adapted to the pattern to be out, which, operating through the rod 31, would turn the tracer (it being held in a like bracket) to the same angle. The tracer and pointer are thus kept parallel to one another. The brackets of the tracer and the several. cutting-tools having been secured by the set-screw 19, and the table B run to one end of the machine, the rocking frame L is put in the position shown in Fig. 1 of the drawings, which would bring the series of cutting-tools and tracer on the tool-carrier frame 0 in contact with the pattern and material to be carved. The tools being driven at a high rate of speed, the table B is passed under them, the pointer coming in contact with the pattern, and being by the pattern raised and lowered, raises and lowers the segment 23, attached to it, which in turn, operating through the link 27 and crank 28, turns the shaft 29, which has on it the crank 28, connecting with the link 27 of the cutter, and communicates the same motion to the cutter that is given to the tracer or pointer, all being pressed to their lowest positions by the spring 30 on the shaft 29. Thus a narrow path is cut in the material to be carved the width of the cutter, and the table B having reached its limit of motion the stop 10 comes in contact with the dog 8 and reverses the motion of the table B, and at the same time throws the rocking frame L so as to bring in contact with the pattern and material the tracer and cutting-tools on the toolcarrier frame P, which, being set at an opposite angle from the other series, cut in theindentations and the other side of the pattern. The table B having come back to its original position the other stop thereon comes in contact with the dog 8, reverses the motion of the gearwheel 0, throws the rocking frame L back to its original position and at the same time turns the feed-screw 17, and thus moves the table B a short distance in a sidewise direction, so that a new part of the pattern and new material are brought in for the next reciprocation of the table. This is continued until the entire surface of the pattern to be reproduced has been passed over by the pointer, when the material carved will be found to have been made in exact d uplication of the pattern furnished, without the necessity of any attention from the starting to the stopping of the machine, whereby one attendantis able to care for a large number of machines.

It will be observed that the cutting-tools are at an angle of about forty-five degrees to the plane of the table B, and are also at about an angle of forty-five degrees to the line of reciprocating motion of the table B, whereby they follow all the parts of the pattern, bringing to bear the corner or edge of the cutting-tool and keeping the material operated upon free from shavings and cuttings. It will also be observed that the series of cutting-too1s on the frame 0 are at an angle with the line of motion of the reciprocating table B the reverse of that of the angle at which the cutters and the frame P are, so that one side of the part to be carved will be cut by one series of the cutters and the other side of the part to be carved by the other series of cutters.

In adjusting the machine I have found it desirable to make one point of one cutter on the frame 0 directly in line with the cutter on the frame P, so that they will cut substantially on the same line, one cutter when the table B is moving in one direction and the other cutter when it is moving in the other direction, but at an angle to one another. They cut in all directions and accurately follow the pattern placed under the tracer.

What I claim as new, and desire to secure by Letters Patent, is

1.. The combination in a carving-machine of a rocking frame having attached thereto a pointer and cutter on one side, and a pointer and cutter on the other side, so arranged that one pointer and cutter will be lowered when the frame is swung to one side, and the other pointer and cutter will be lowered when the frame is swung to the other side, as specified and set forth.

2. The combination in a carving-machine of two pointers and two cutting-tools so attached to a rocking fr me that the operative position of one pointer will be substantially in line with the operative position of the other pointer, and the operative position of one cutter will be substantially in line with the operative position of the other cutter, substantially as specified and set forth.

3. The combination in a carving-machine of a rocking frame having attached thereto two tool-carrier frames adjustable about the same center as that about which the rocking frame turns, substantially as specified and set forth.

4. The combination in a carving-machine of a rocking frame having attached thereto two tool-carrier frames, adjustable about the axis of the shaft by which motion is supplied to the cutting-tools carried in the tool-carrier frames, substantially as specified and set forth.

5. The combination in a carving-machine of a rocking frame having attached thereto two tool-carrier frames adjustable about the axis of the shaft by which motion is supplied; the tool-carrier frames having attached thereto brackets adjustable about another shaft, through which motion is supplied to the tools, substantially as specified and set forth.

6. The combination in a carving-machine, of a reciprocating table to which the pattern and material to be carved are attached, supported on a platform having an intermittent sidewise motion, in combination with a tracer and cutter parallel with one another, and arranged to move in unison in all directions, having their operative ends, when in operation, inclined toward the reciprocating table at an angle of about forty-five degrees and in the general direction of the then motion of the reciprocating table, substantially as specified and set forth.

'7. The combination in a carving-machine of a reciprocating table, to which the pattern and material to be carved are attached; a tracer and cutting-tool, pressed out in the line of their axis by a spring, the tracer and cuttcr being parallel to one another and arranged to advance in unison at an angle of about forty-five degrees to the face of the reciprocating table, and at about the same angle to the line of motion thereof, the point of the operative tracer and cutting-tool being in the to one side, and the other pointer and cutter will be lowered when the frame is swung to the other side, substantially as specified and set forth.

9. The combination in a carving-machine of a reciprocating table, to which the pattern and material to be carved are attached, supported on a table having an intermittent sidewise motion; two series, each consisting of a tracer and cutter, each arranged on an adjustable tool-carrier frame supported on a rocking frame with mechanism whereby the rocking frame will be rocked on its axis at the end of each movement of the reciprocating table, substantially as specified and set forth.

FREDERICK SNO\V.

itnesses:

ADDISON F. KYNOR, BARON IIIGHAM. 

